Question Discussion & Solution

Given equation: 49 A 7 B 5 C 6 = ?

After interchanging alphabets: 49 ÷ 7 + 5 × 6 = ?

7 + 30

37

Hence, ‘37’ is the answer.

SRAM (static RAM) is random access memory (RAM) that retains data bits in its memory as long as power is being supplied.

Inside a dynamic RAM chip, each memory cell holds one bit of information and is made up of two parts: a transistor and a capacitor.

Given,

Given Expression: 70S7P21R2Q15

According to question :

=70 ÷ 7 + 21 × 2 – 15

Using BODMAS rule,

=10 + 21 × 2 – 15

= 10 + 42 – 15

= 52 – 15

= 37

Hence, value of the given expression is ‘37’.

Rohit started walking towards the west.

He walked for 300 m and turned to his right from the post office.

From there, he walked for 200 m.

He then turned to the left and walked a few steps.

Rohit is now standing in front of West direction.

Hence, "West" is the correct answer.

The correct answer is Authentication.

Key Points

• MAC stands for message authentication code.
• A message authentication code is an authentication tag (also called a checksum) derived by application of an authentication scheme, together with a secret key, to a message.
• MACs can be categorized as - 
  • Unconditionally secure
  • Hash function-based
  • Stream cipher based
  • Block cipher based