Assembly and C
Questions 101:
1.
How long will it take for a 128kB file to go across at
1Mbps?
2.
DMA full form?
3.
Register: Register is the
fastest memory in a computer which holds information. True or False
4.
A 32-bit processor means it can perform operations on 32-bit
data; therefore, the size of registers is 32 bits and ALU also performs 32-bit
operations. A 64-bit CPU performs the operation in 64-bit data; therefore, it
contains 64-bit register and 64-bit ALU.
True or False
5.
Which of the following is a control signal?
a.
Read Signal
b.
Write Signal
c.
Interrupt
d.
Bus Request
e.
Bus Grant
f.
I/O Read and Write
g.
All of the above
6.
There are two types of CPU technology CISC and RISC.
What is the full form of CISC and RISC?
7.
The characteristics of 8086 are called reduced
instruction set computers (RISC)?
True or False
8.
What are the two types of CPU architecture?
9.
Von Neumann uses the data bus to transfer data and
instructions from the memory to the CPU whereas Harvard architecture uses
separate buses for instructions and data.
True or False
10.
Define Clock Speed?
11.
Cache memory is a small amount of high-speed memory used for
temporary data storage based between the processor and main memory.
True or False
12.
What is the full form of SIMD technique used in MMX technology?
13.
How many general-purpose registers 8085 has and what are
they?
14.
What is the full form of BCD?
15.
Fill in the full form of the acronym presented in the diagram
below for flag register?
|
S |
Z |
------ |
AC |
------ |
P |
------ |
CY |
16. Name 3 special purpose register in 8085?
17. What are the two 16-bit registers used to hold memory addresses?
18.
When a byte (machine code) is being fetched, the
program counter is incremented by one to point to the next memory location?
True or False
19.
Program Counter holds the address of the last program
request in a stack whereas Stack Pointer holds the address of the next
instruction that should be executed?
True or False
20.
The stack is usually retrieved in a LIFO fashion.
True or False
21.
Which of the following is not one of the 5 addressing
modes of intel 8085 microprocessor?
A.
Direct Addressing Mode
B.
Register Addressing Mode
C.
Register Indirect Addressing Mode
D.
Immediate Addressing Mode
E.
Explicit Addressing Mode
F.
Implicit Addressing Mode
22.
Which of the following is the instruction group of
Intel 8085 microprocessor?
A.
Data Transfer Group
B.
Arithmetic Group
C.
Logical Group
D.
Branch Control Group
E.
I/O and Machine Control Group
F.
All of the above
23.
How many bit is 8085 microprocessor and 8086
microprocessor?
24.
What does BIU and EU stand for?
25.
What are the two separate functional units of 8086
architecture?
26.
8086 architecture employs parallel processing?
True or False
27.
8086 has
an instruction queue, which is capable of storing six instruction bytes from
the memory resulting in faster processing. True or False
28.
What are the two stages of pipelining 8086
microprocessor uses?
29.
The Bus Interface Unit(BIU) contains four 16-bit
special purpose registers called as Segment Registers. What are their names?
30.
What is the full form of ISR?
31.
What is the block of memory reserved(1Kb) for storing
the starting addresses of interrupt service routines in 8086 system called?
32.
What are the three techniques of mapping between main
memory and cache?
33.
Which is the fastest and most flexible mapping between
cache and main memory?
34.
What is the full form of DRAM and SRAM?
35.
DRAM is used for cache memory and SRAM is used for main
memory? True or False
36.
What does opcode stand for?
C Questions
37.
What is scanf used for?
38.
What does %d and & operator mean in C?
39.
We cannot declare a variable without specifying its
data type? True or False
40.
A variable in C
can be altered or its value can be changed, but same is not true for its type.
True or False
41.
In C int can store only 2 bytes worth of data as its storage
capacity is 2 bytes while float storage capacity is 4 bytes. True or False
42.
What are the four data types in C ?
43.
What are the three logical operators in C ?
44.
What does these symbols indicate ?
&&, ||, ! !=
45.
There are how many keywords in C ?
46.
The length of the identifiers should not be more than 24
characters in C ? True or False
47.
The Format specifier is a string used in
the formatted input and output functions. What %d, %i,%ld,%c ,%sand
%u are used for?
48.
What do the following escape sequences stand for ?
\a, \b, \r, \0, \n
49.
What is the full form of ASCII ?
50. WHAT IS “&” AND “*” OPERATORS IN C?
51.
What are the two ways to define constant in C
programming ?
52.
As we know that non-static functions are global by default
means that the function can be accessed outside the file also, but if we
declare the function as static, then it limits the function scope. The static
function can be accessed within a file only. True or False
53.
What are the 5 programming errors in C?
54.
What is syntax error also known as?
55.
Linker errors are mainly generated when the executable file
of the program is not created, like for example using Main() instead of main().
True or False
56.
Write a syntax for if Statement in C?
57.
if else-if ladder statement is similar to the switch case
statement. True or False
58.
Which Data Type Cannot Be Checked In
Switch-Case Statement?
a. enum b. character c. integer
d. float
59.
What are the three types of loops in C
language?
60.
Typecasting allows us to convert one data
type into other. In C language, we use cast operator for typecasting which is
denoted by (type). True or False
61.
What is goto statement is also known as
in C?
62.
The only condition in which using goto is
not preferable is when we need to break the multiple loops using a single statement
at the same time. True or False
63.
What does ceil(), floor() do in C?
64.
There are 2 types of function in C,
library functions and user-defined functions. Printf(), gets(), puts(), ceil(),
floor() belong to which category.
65.
All string related library functions like
gets(), puts(),etc. are in which header file?
66.
What is conio.h for?
67.
Which header file contains all the
general library functions like malloc(), calloc(), exit(), etc.
68.
What does gets() do in C?
69.
What is the purpose of gets () and puts
() function?
70.
Is space accepted as a character in gets()?
71.
What are the alternative functions to
gets()?
72.
Which header file contain functions like
malloc(), calloc(), exit()?
73.
In call by value method, we can modify
the value of the actual parameter by the formal parameter. True or False
74.
In call by reference, the address of the
variable is passed into the function call as the actual parameter. True or
False
75.
Spatial locality: states that recently
accessed items are likely to be accessed in the near future.
Temporal locality says that items whose
addresses are near one another tend to be referenced close together in time.
True or False
76.
Is i ++ the same as i += 1 ?
77.
i++ known as Post Increment whereas ++i
is called Pre Increment, are they the same?
78.
We can store pointers into the register,
i.e., a register can store the address of a variable. True or False
79.
There are four types of storage classes
in C. What are they?
80.
What are the two types of buffer overflow
vulnerabilities?
81.
Stack is the memory space used by the operating
system and heap is the memory space used to store dynamic data which is managed
by the program. True or False
82. The data on the stack is stored and retrieved in an organized
fashion(first-in-last-out). True or false
83.
What is strcmp() in C
84.
What is an Array in C?
85.
Strings are actually a one-dimensional
array of characters terminated by a null character '\0'. True or False
86.
Since, puts() prints an additional
newline character with the string, which moves the cursor to the new line on
the console, the integer value returned by puts() will always be equal to the
number of characters present in the string plus 1.True or False
87.
What is the function of strlen() ?
88.
What is the function of strstr()?
89.
What is a pointer in C?
90.
What is a double pointer?
91.
For 32-bit and 64 bit architecture, by
how may bytes the pointer is incremented and decremented respectively?
92.
What is a dangling pointer?
93.
Dynamic memory allocation in C language
is possible by 4 functions of stdlib.h header file. What are those 4 functions?
94.
In static memory, memory is allocated at
run time and in dynamic memory, memory is allocated at compile time. True or False.
95.
What are the functions of malloc() & calloc()?
96.
What are the functions of free() and
realloc()
97.
What is a Enum in C?
98.
What is getch() in C?
99.
What is heap area in data segment used
for?
100.
What are the four different parts of data
segment(special memory segment) in C?
101.
What are the two types of files one
should know about in C?
Answers
1.
1 sec
2.
Direct Memory Access
3.
True
4.
True
5.
G- All of the above.
6.
Complex Instruction
Set Computer and Reduced Instruction Set Computer
7.
False (In fact, 8086
is based on CISC)
8.
Von Neumann
Architecture and Harvard Architecture
9.
True
10. The speed of the clock determines the speed at which the
processor executes instructions.
11. True
12. Single Instruction Multiple Data
13. 8085 has 6 general-purpose registers to store 8-bit data.
They are B, C , D , E, H and L. These can be combined as register pairs BC, DE
and HL
14. Binary-Coded Decimal
15. Flag Register:
|
Sign Flag(most significant bit) |
Zero Flag |
------- |
Auxiliary Carry Flag |
-------- |
Parity Flag |
------- |
Carry Flag |
16. Accumulator (also defined as register A is the part of
ALU), Flag register/Status register and Memory registers.
17. Program Counter and Stack Pointer
18. True
19. False (It is vice versa instead. Program counter also
called instruction counter holds the address of the next instruction that
should be executed and stack pointer holds the address of the last program
request in a stack.)
20. True – (LIFO stands for Last in first out.)
21. E – Explicit Addressing Mode
22. F – All of the above
23. 8085 microprocessor: 8-bit (8-bit data bus, 16-bit
address bus which can address up to 64KB)
8086 microprocessor: 16-bit
(16-bit data bus, 20-bit address bus, can access up to 1Mb of memory.)
24. BIU – Bus Interface Unit
EU – Execution Unit
25. BIU – Bus Interface Unit and
EU – Execution Unit
26. True
27. True
28. Fetch stage and Execute stage
29. Direct Mapping, Associative Mapping and Set Associative
Mapping.
30. Data Segment Register(DS), Code Segment Register(CS),
Stack Segment Register(SS), Extra Segment Register(ES)
31. Interrupt service routine
32. Interrupt vector table or Interrupt pointer table
33. Associative Mapping
34. Dynamic Random Access Memory and Static Random Access
Memory
35. False (DRAM for main memory and SRAM for Cache memory,
(dynamic refers to the tendency of the stored charge to leak away, even with
power continuously applied whereas SRAM will hold its data as long as power is
supplied to it.))
36. Operation Code
37. scanf is used to take input from the users.
38. %d is a format specifier notifies the value should be of
integer type(decimal integer) and & operator is used to get the address of
the variable.
39. True
40. True
41. True
42. BVED – Basic Data Type (int, char, float, double), Void
Data Type (void), Enumeration Data Type (enum) and Derived Data type (array,
pointer, structure, union – aups)
43. AND, OR and NOT
44. && - AND operator, || - OR operator, ! = Not
Operator, != is not equal to
45. 32
46. False. The length of the identifiers
should not be more than 31 characters
47. %d/%i – It is used to print the signed
integer value –(signed -both positive and negative values)
%ld – It is
used to print long signed integer values.
%c-It is
used to print the unsigned character.
%c – It is
used to print the strings.
%u – It is
used to print unsigned integer value.
48. \a –Alarm or Beep, \b – backspace. \r
-Carriage return, \0 – Null,
\n – New line
49. American Standard Code for Information
Interchange
50. “*” Operator is used as pointer to a
variable. Example: * a where * is pointer to the variable a.
&
operator is used to get the address of the variable. Example: &a will give
address of a.
51. const keyword and #define preprocessor
52. True
53. Syntax error
Run-time
error
Linker
error
Logical
error
Semantic
error
54. Compilation errors
55. True
56. if <expression>{
//code to
be executed
}
--------Eg.
int
main()
int
number=0;
printf(“Enter
a number”);
scanf(“%d”,
&number);
if(number%2==0{
printf(“%d
is even number”, number);
}
57. True
58. d. float
59. do while(post tested loop), while(pre tested loop), for
60. True
61. The goto statement is known as jump statement in C.
62. False (It is indeed preferable)
63. The ceil function returns the
smallest integer that is greater than or equal to x (ie: rounds
up the nearest integer)-(tip – think ceiling). The floor function
returns the largest integer that is smaller than or equal to x (ie: rounds
downs the nearest integer)-(tip – think floor).
Ex- Enter a float value:
123.45
floor value:123.000000
ceil value:124.000000
64. Library functions
65. string.h. (The gets() and puts() are
declared in the header file stdio.h)
66. This is a console input/output header file.
67. Stdlib.h
68. The gets() function enables the user to enter some
characters followed by the enter key. All the characters entered by the user
get stored in a character array.
69. The gets() functions are used to read string input from
the keyboard and puts() function displays it.(Tip-gets() similar to scanf() and
puts() similar to printf())
70. Yes (scanf do not accept space as character).
71. Fgets() and getline().
72. stdlib.h
73. False. (In call by value method, we can not modify the
value of the actual parameter by the formal parameter.)
74. True
75. False ( It is vice versa – Spatial links with space, and
temporal with time)
76. Yes
77. No - i++ is post increment because it increments i's
value by 1 after the operation is over. ++i is pre increment because it
increments i's value by 1 before the operation.
int i = 1, j;
j = i++; --------------à j=1 but i=2
j=++i; ----------------à j=2 and i=2.
78. True
79. Automatic, External, Static and Register.
80. Stack overflow and heap overflow.
81. True
82. False The data on the stack is stored and retrieved in an organized
fashion(last-in-first-out).
83. The strcmp() function is used to compare
two strings two strings str1 and str2 . If two strings are same then strcmp()
returns 0 , otherwise, it returns a non-zero value. The function strcmp() is
a built-in library function and it is declared in “string. h” header file.
84. An Array is a data structure containing
a number of data values(all of which are if same type). (Each data element in
the array can be randomly accessed by using its index number).
85. True
86. True
87. The strlen() function returns the length of the given
string. It doesn't count null character '\0'.
88. The strstr() function returns pointer to the first
occurrence of the matched string in the given string.
89. Pointer is a variable that contains the address(or memory
address) of another variable. It can be declared using *symbol. A pointer is
used to store the address of a variable in C.
90. In C, we can also define a pointer to store the address
of another pointer. Such pointer is known as a double pointer (pointer to
pointer).
91. For 32-bit int variable -incremented and decremented by 2
bytes.
For 64-bit int
variable-incremented and decremented by 4 bytes.
(Same applies for C pointer
addition and pointer subtraction -2* number
for 32-bit and 4*number for 64-bit)
92. Pointer initialized with an invalid address is a dangling
pointer. (Dangling pointer occurs at the time of the object destruction when
the object is deleted or de-allocated from memory without modifying the value
of the pointer.)
93. malloc(), calloc(), realloc() and free()
94. False. (Static memory is used in the array, memory is
allocated at compile time and memory can’t be increased while executing the program.
Dynamic memory is used in the linked list, memory is allocated at run time and
memory can be increased while executing the program.)
95. malloc() stands for memory allocation, it reserves a
block of memory of the specified number of bytes.
calloc() stands for
contiguous allocation, malloc() function allocates memory and leaves the memory
uninitialized, whereas calloc() function allocates memory and initializes all
bits to zero.
96. free() – It frees the space allocated in the memory
pointed by ptr.(sytax- free(ptr);)
realloc()- If the dynamically
allocated memory is insufficient or more than required, you can change the size
of previously allocated memory using the realloc() function.
97. It is an enumeration type, user defined data type that
consists of integer values.
98. Predefined non standard function that is defined in
conio.h header file. It is used to hold the output screen for some time until
the user passes a key from the keyboard.(Using this function, we can hide the
input characted provided by the users in the ATM PIN, password, etc.
99. The heap area is used to store the data structures which
are created by using dynamic memory allocation.
100.
Data area, Code
area, Heap area, Stack area(Initialize variable and Non-initialize variable).
101.
Text files and binary
files.
Thank you
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