Explore topic-wise MCQs in Cryptography and Network Security.

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Cryptography and Network Security knowledge and support exam preparation. Choose a topic below to get started.

1.

Find the 8-bit word related to the polynomial x6 + x5 + x2 + x +1

A. 00010011
B. 11000110
C. 00100110
D. 01100111
Answer» E.
Discussion
2.

Find the 8-bit word related to the polynomial x5 + x2 + x

A. 00010011
B. 01000110
C. 00100110
D. 11001010
Answer» D. 11001010
Discussion
3.

If f(x)=x3+x2+2 and g(x)=x2-x+1, find: f(x) x g(x)

A. x4+x2+2x+2
B. x5+2x3+2x+3
C. x5+3x2-2x+2
D. x4+x2+x+1
Answer» D. x4+x2+x+1
Discussion
4.

If f(x)=x3+x2+2 and g(x)=x2-x+1, find the quotient of f(x) / g(x)

A. x+3
B. x2+4
C. x
D. x+2
Answer» E.
Discussion
5.

If f(x)=x4+x2-x+2 and g(x)=x2-x+1, find: f(x) – g(x)

A. x4+1
B. x2+1
C. x2+2x+6
D. x4-1
Answer» B. x2+1
Discussion
6.

If f(x)=x4+x3+2 and g(x)=x3-x+6, find: f(x) + g(x)

A. 2x4+2x3+x+8
B. x4+2x3-x+8
C. x4+x2+x+8
D. x4+x3+8
Answer» C. x4+x2+x+8
Discussion
7.

If f(x)=x3+x2+2 and g(x)=x2-x+1, find: f(x) – g(x)

A. x3+x+4
B. x3+x+1
C. x3+x2+3
D. x3+3x+2
Answer» C. x3+x2+3
Discussion
8.

If f(x)=x3+x2+2 and g(x)=x2-x+1, find: f(x) + g(x)

A. x3+2x2-x+3
B. x3+x2+3
C. x3+x+1
D. x2+2x+4
Answer» B. x3+x2+3
Discussion
9.

What do the above numbers correspond to?0 1 2 3 40 4 3 2 1

A. Both Additive Inverses
B. Both Multiplicative Inverses
C. Additive and Multiplicative Inverse respectively
D. Multiplicative and Additive Inverses respectivelyView Answer
Answer» C. Additive and Multiplicative Inverse respectively
Discussion
10.

IF_F(X)=X4+X2-X+2_AND_G(X)=X2-X+1,_FIND:_F(X)_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬®_G(X)?$#

A. x<sup>4</sup>+1
B. x<sup>2</sup>+1
C. x<sup>2</sup>+2x+6
D. x<sup>4</sup>-1
Answer» D. x<sup>4</sup>-1
Discussion
11.

IF_F(X)=X4+X3+2_AND_G(X)=X3-X+6,_FIND:_F(X)_+_G(X)?$

A. 2x<sup>4</sup>+2x<sup>3</sup>+x+8
B. x<sup>4</sup>+2x<sup>3</sup>-x+8
C. x<sup>4</sup>+x<sup>2</sup>+x+8
D. x<sup>4</sup>+x<sup>3</sup>+8
Answer» E.
Discussion
12.

If f(x)=x3+x2+2 and g(x)=x2-x+1, find the quotient of f(x) / g(x)$

A. x+3
B. x<sup>2</sup>+4
C. x
D. x+2
Answer» D. x+2
Discussion
13.

If f(x)=x3+x2+2 and g(x)=x2-x+1, find: f(x) – g(x?#

A. x<sup>3</sup>+x+4
B. x<sup>3</sup>+x+1
C. x<sup>3</sup>+x<sup>2</sup>+3
D. x<sup>3</sup>+3x+2
Answer» B. x<sup>3</sup>+x+1
Discussion
14.

If f(x)=x3+x2+2 and g(x)=x2-x+1, find: f(x) + g(x)

A. x<sup>3</sup>+2x<sup>2</sup>-x+3
B. x<sup>3</sup>+x<sup>2</sup>+3
C. x<sup>3</sup>+x+1
D. x<sup>2</sup>+2x+4
Answer» C. x<sup>3</sup>+x+1
Discussion
15.

How many numbers cannot be used in GF(p) in 2n where n=4?

A. 2
B. 5
C. 3
D. 1
Answer» C. 3
Discussion
16.

Both Additive Inverses

A. Both Multiplicative Inverses
B. Additive and Multiplicative Inverse respectively
C. Multiplicative and Additive Inverses respectively
Answer» B. Additive and Multiplicative Inverse respectively
Discussion
17.

Multiplication / Division follow which operation?

A. XOR
B. NAND
C. AND
D. OR
Answer» D. OR
Discussion
18.

A very common field in this category is GF(2) with the set {1, 2} and two operations, addition and multiplication.

A. True
B. False
Answer» C.
Discussion