Test: Flip Flops - Electrical Engineering (EE) MCQ


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15 Questions MCQ Test GATE Electrical Engineering (EE) 2024 Mock Test Series - Test: Flip Flops

Test: Flip Flops for Electrical Engineering (EE) 2024 is part of GATE Electrical Engineering (EE) 2024 Mock Test Series preparation. The Test: Flip Flops questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Flip Flops MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Flip Flops below.
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Test: Flip Flops - Question 1

Latches constructed with NOR and NAND gates tend to remain in the latched condition due to which configuration feature?

Detailed Solution for Test: Flip Flops - Question 1

Latch is a type of bistable multivibrator having two stable states. Both inputs of a latch are directly connected to the other’s output. Such types of structure is called cross coupling and due to which latches remain in the latched condition.

Test: Flip Flops - Question 2

The truth table for an S-R flip-flop has how many VALID entries?

Detailed Solution for Test: Flip Flops - Question 2

The SR flip-flop actually has three inputs, Set, Reset and its current state. The Invalid or Undefined State occurs at both S and R being at 1.

Test: Flip Flops - Question 3

Which of the following is correct for a gated D-type flip-flop?

Detailed Solution for Test: Flip Flops - Question 3

In D flip flop, when the clock is high then the output depends on the input otherwise reminds previous output. In a state of clock high, when D is high the output Q also high, if D is ‘0’ then output is also zero. Like SR flip-flop, the D-flip-flop also have an invalid state at both inputs being 1.

Test: Flip Flops - Question 4

The logic circuits whose outputs at any instant of time depends only on the present input but also on the past outputs are called ________________

Detailed Solution for Test: Flip Flops - Question 4

In sequential circuits, the output signals are fed back to the input side. So, The circuits whose outputs at any instant of time depends only on the present input but also on the past outputs are called sequential circuits. Unlike sequential circuits, if output depends only on the present state, then it’s known as combinational circuits.

Test: Flip Flops - Question 5

How many types of sequential circuits are?

Detailed Solution for Test: Flip Flops - Question 5

There are two type of sequential circuits viz., (i) synchronous or clocked and (ii) asynchronous or unclocked. Synchronous Sequential Circuits are triggered in the presence of a clock signal, whereas, Asynchronous Sequential Circuits function in the absence of a clock signal.

Test: Flip Flops - Question 6

The basic latch consists of ___________

Detailed Solution for Test: Flip Flops - Question 6

The basic latch consists of two inverters. It is in the sense that if the output Q = 0 then the second output Q’ = 1 and vice versa.

Test: Flip Flops - Question 7

The output of latches will remain in set/reset untill ___________

Detailed Solution for Test: Flip Flops - Question 7

The output of latches will remain in set/reset untill the trigger pulse is given to change the state.

Test: Flip Flops - Question 8

The circuits of NOR based S-R latch classified as asynchronous sequential circuits, why?

Detailed Solution for Test: Flip Flops - Question 8

The cross-coupled connections from the output of one gate to the input of the other gate constitute a feedback path. For this reason, the circuits of NOR based S-R latch classified as asynchronous sequential circuits. Moreover, they are referred to as asynchronous because they function in the absence of a clock pulse.

Test: Flip Flops - Question 9

One example of the use of an S-R flip-flop is as ___________

Detailed Solution for Test: Flip Flops - Question 9

The SR flip-flop is very effective in removing the effects of switch bounce, which is the unwanted noise caused during the switching of electronic devices.

Test: Flip Flops - Question 10

When both inputs of a J-K flip-flop cycle are high, the output will ___________

Detailed Solution for Test: Flip Flops - Question 10

The JK Flip Flop is the most widely used flip flop. It is considered to be a universal flip-flop circuit.

Therefore, the correct answer is C.

Test: Flip Flops - Question 11

A basic S-R flip-flop can be constructed by cross-coupling of which basic logic gates?

Detailed Solution for Test: Flip Flops - Question 11

The basic S-R flip-flop can be constructed by cross coupling of NOR or NAND gates. Cross coupling means the output of second gate is fed to the input of first gate and vice-versa.

Test: Flip Flops - Question 12

Whose operations are more faster among the following?

Detailed Solution for Test: Flip Flops - Question 12

Combinational circuits are often faster than sequential circuits. Since the combinational circuits do not require memory elements whereas the sequential circuits need memory devices to perform their operations in sequence. Latches and Flip-flops come under sequential circuits.

Test: Flip Flops - Question 13

The sequential circuit is also called ___________

Detailed Solution for Test: Flip Flops - Question 13

The sequential circuit is also called a latch because both are a memory cell, which are capable of storing one bit of information.

Test: Flip Flops - Question 14

In S-R flip-flop, if Q = 0 the output is said to be ___________

Detailed Solution for Test: Flip Flops - Question 14

In S-R flip-flop, if Q = 0 the output is said to be reset and set for Q = 1.

Test: Flip Flops - Question 15

What is a trigger pulse?

Detailed Solution for Test: Flip Flops - Question 15

Trigger pulse is defined as a pulse that starts a cycle of operation.

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