What are the advantages and disadvantages of using fixed length records?

What are the advantages and disadvantages of using fixed length records?

Fixed Length: Advantage: Simple to calculate the starting byte of each record within the file and starting byte of fields within records. Disadvantage: Wasteful of space when storing variable length data because the max data length must be allocated for every record e.g. Strings.

What are the advantages of fixed length instructions?

The advantages of fixed length instructions with a relatively uniform formatting is that fetching and parsing the instructions is substantially simpler.

What is fixed length instruction?

Fixed length (RISC) instructions Some computer CPUs use a fixed length instruction encoding format. That means: Every computer instruction is represented using the same number of bytes.

What are the disadvantages of variable length coding?

Variable length code:

• Different code can have a different number of bits.
• Advantage: more efficient (uses less bits)
• Disadvantage: harder to encode and decode.

What is a disadvantage of fixed record blocking?

Disadvantage: Records do not start at fixed location in each block. Unspanned: Advantage: Easy to identify the location of a specific record in the file. Disadvantage: Produces unused space in each disk block.

What is the difference between fixed length and variable length?

A fixed length variable is one whose length never varies, whereas a variable one is whose length varies with changes in inputs. The fixed length ensures the fixed length is never variable. A variable-length is one in which the length of each record can vary, depending on what data is stored in the field.

Which is not advantage of RISC over CISC?

Online Test

3.	The feature of RISC that is not present in CISC is
a.	branch prediction
b.	pipelining
c.	branch prediction and pipelining
d.	none of the above

Which of the following is advantage of CISC over RISC?

CISC ISAs use more transistors in the hardware to implement more instructions and more complex instructions as well. RISC needs more RAM, whereas CISC has an emphasis on smaller code size and uses less RAM overall than RISC.

What are the advantages and disadvantages of variable length encoding?

Advantages: It easy to provide a large repertoire of opcodes, Addressing can be more flexible, with various combinations of register. Disadvantages: an increase in the complexity of the CPU.

What is the advantage of variable length records over fixed?

The advantage of variable length records is that space is not wasted, only the space needed is ever used. The main problem with variable length records is that it is much more difficult to locate the start and end of individual records and fields. This is because they are not separated by a fixed amount of characters.

What is the advantage of variable length records over fixed length records?

What are the advantages and disadvantages of variable-length instruction format?

One of the advantages of using a variable-length instruction format is that it easy to provide a large repertoire of opcodes, with different opcode lengths. Addressing can be more flexible, with various combinations of register and memory references plus addressing modes. A disadvantage however is an increase in the complexity of the CPU.

What are the disadvantages of fixed length instruction in microprocessors?

(Ironically, in cases like MIPS/MIPS16, to indicate a mode with smaller or variable length instructions.) Fixed length instruction encoding and uniform formatting do have disadvantages. The most obvious disadvantage is relatively low code density.

What is the difference between variable length and fixed length encodings?

Obviously, variable length encodings require addressing at the granularity of a parcel which is typically smaller than an instruction for a fixed-length ISA. This means that branch offsets either lose some range or must use more bits. This can be compensated by support for more different immediate sizes.

What is the advantage of fixed extent over variable extent?

Fixed extents also gives more control on managing the extents themselves and transferring between environments when needed. The only real advantage of fixed extents over variable extents today, is that the space is pre-allocated and therefore always available to the database.