A flip‐flop is a bistablemultivibrator used to store one bit of data. It has two stable states and changes between them based on the input and clock signals, making it a crucial element in digital memory.
Which of the following is used to store multiple bits of data?
A Counter
B ALU
C Register
D Decoder
A register is a digital storage device used to store multiple bits of data. Registers are typically used in processors and microcontrollers to hold data temporarily during computation or data transfer.
What is the purpose of a counter in digital electronics?
A To perform arithmetic
B To count pulses
C To decode signals
D To store data
A counter is a digital circuit used to count clock pulses or events. It is used for timing, frequency division, and controlling processes in digital systems.
What is the output of an AND gate when both inputs are 0?
A Undefined
B High
C 1
D 0
An AND gate outputs 1 only when both inputs are 1. In all other cases, including when both inputs are 0, the output will be 0. This makes the AND gate useful for logical conjunctions.
Which of these devices stores binary data temporarily?
A Multiplexer
B Decoder
C RAM
D ROM
RAM (Random Access Memory) is a type of volatile memory that stores binary data temporarily while a device is powered on. It is used for data that is actively being processed by the system.
What is the function of a register in a digital system?
A Data storage
B Signal routing
C Arithmetic calculation
D Data encoding
A register is a small storage device used to hold data temporarily. It is commonly found in microprocessors and is crucial for holding intermediate results during computations and data transfer operations.
Which of the following is a type of sequential circuit?
A Adder
B Flip-flop
C OR gate
D AND gate
A flip-flop is a sequential circuit because its output depends not only on the current inputs but also on its previous state. It is used for data storage, memory, and synchronization in digital systems.
Which circuit type performs an action based on previous states?
A Encoder
B Multiplexer
C Sequential
D Combinational
A sequential circuit’s output depends on both the current inputs and the previous states. This type of circuit is used for tasks like memory storage, timing, and controlling processes in digital systems.
Which memory type is non-volatile?
A Cache
B RAM
C Flash
D ROM
ROM (Read-Only Memory) is non-volatile, meaning it retains its data even when power is lost. ROM is typically used to store firmware, boot instructions, and other permanent data.
What is the primary role of a clock signal in digital circuits?
A Synchronize operations
B Generate signals
C Store data
D Perform arithmetic
A clock signal synchronizes the timing of operations in a digital circuit, ensuring that all components like flip-flops, registers, and counters change states in a coordinated manner.
What is the function of a decoder in a digital system?
A Encode data
B Count pulses
C Convert binary inputs to output lines
D Perform logic operations
A decoder converts binary inputs into one of several output lines, activating the corresponding output based on the binary input. Decoders are often used in memory addressing and control systems.
Which of these circuits is used to encode multiple inputs into binary?
A Counter
B Decoder
C Encoder
D Multiplexer
An encoder converts multiple input lines into a smaller set of binary output lines. For example, a 4-to-2 encoder takes 4 inputs and produces a 2-bit binary output corresponding to the active input.
What is the function of a latch in digital electronics?
A Select inputs
B Store data temporarily
C Perform logical operations
D Count pulses
A latch is a basic memory element used to store one bit of data temporarily. Unlike a flip-flop, which requires a clock signal, a latch is level-triggered and changes its state based on input conditions.
Which of the following is true about a flip-flop?
A It performs logical operations
B It stores multiple bits of data
C It is a combinational circuit
D It changes state on a clock signal
A flip-flop is a sequential circuit that changes its state based on the input signals and the clock signal. It is used to store data and synchronize operations in digital systems.
Which circuit stores and shifts data for manipulation?
A Shift register
B ALU
C Register
D Decoder
A shift register is a sequential circuit that stores data and shifts it to the left or right with each clock pulse. It is often used in digital signal processing and data transfer applications.