IBPS RRB IT Officer flashcards
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32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- 3NF
- Third normal form: a relation is in 2NF and has no transitive dependency, meaning every non-key attribute depends only on candidate keys, not on other non-key attributes.
- ACID properties
- Atomicity, Consistency, Isolation, Durability: the four guarantees a database transaction must satisfy so that partial or concurrent updates cannot leave data in an invalid state.
- TCP three-way handshake
- Connection setup where the client sends SYN, the server replies SYN-ACK, and the client sends ACK, after which both sides have agreed on initial sequence numbers.
- Symmetric vs asymmetric encryption
- Symmetric encryption uses one shared secret key and is fast; asymmetric uses a public-private key pair and supports key exchange and digital signatures without prior shared secrets.
- Deadlock conditions
- Four simultaneous conditions cause deadlock: mutual exclusion, hold and wait, no preemption, and circular wait. Removing any one of them prevents the deadlock.
- B-tree index
- A balanced tree index that supports equality and range queries with logarithmic lookup cost; it adds storage and slows inserts and updates because the tree must be maintained.
- OSI transport layer
- Layer four of the OSI model; it provides end-to-end delivery, segmentation, flow control, and error recovery, with TCP and UDP as the main protocols.
- Reverse alphabet position
- The position of a letter counted from Z instead of A, computed as 27 minus the forward position, so A is 26, E is 22, and Z is 1.
- Syllogism particular premises
- Two particular premises, such as two statements beginning with some, cannot produce a definite universal conclusion; only possible or particular conclusions follow.
- Circular seating facing centre
- When people face the centre of a circle, a person's left-hand neighbour sits clockwise from them and the right-hand neighbour sits anticlockwise.
- Data sufficiency rule
- Decide only whether the given statements can answer the question; never compute the final value, and test each statement independently before combining them.
- Blood relation tree
- A diagram where vertical links show parent-child generations and horizontal links show spouse or sibling relations; gender must come from an explicit clue, not a name.
- Successive percentage change
- Net change after a percent increase and b percent increase equals a + b + ab/100; a rise then a fall of the same rate gives a net decrease.
- Compound interest formula
- CI equals P times (1 + R/100) raised to T, minus P, where P is principal, R the annual rate, and T the number of years with annual compounding.
- CI minus SI two years
- For two years at rate R, the difference between compound and simple interest equals P times (R/100) squared, where P is the principal amount.
- Average speed equal distances
- When equal distances are covered at speeds x and y, average speed is 2xy divided by (x + y), which is the harmonic mean, not the arithmetic mean.
- Work rate addition
- If A finishes a job in x days and B in y days, their combined time is xy divided by (x + y) days, because their per-day rates add.
- Alligation rule
- The ratio in which two ingredients at different prices must be mixed equals the difference between the mean price and each ingredient price, taken crosswise.
- Boat stream formulas
- Downstream speed is boat plus stream, upstream is boat minus stream; boat speed is half their sum and stream speed is half their difference.
- Present perfect tense
- Formed with has or have plus the past participle; it describes a past action linked to the present, often with since, for, already, yet, or just.
- Since versus for
- Since is used with a point of time when an action began, such as since 2019; for is used with a duration, such as for five years.
- Affect versus effect
- Affect is normally a verb meaning to influence; effect is normally a noun meaning a result. Confusing the two is a common error-spotting trap.
- One of the boys
- The phrase one of the plus a plural noun takes a singular verb, as in one of the boys is absent, because the subject is one, not boys.
- Hindi संधि
- संधि दो वर्णों के मेल से उत्पन्न विकार है; इसके तीन भेद स्वर संधि, व्यंजन संधि और विसर्ग संधि हैं, जैसे विद्या + आलय = विद्यालय।
- Repo rate
- The rate at which the Reserve Bank of India lends short-term funds to commercial banks against government securities; raising it tightens liquidity and cools inflation.
- CRR
- Cash Reserve Ratio: the share of net demand and time liabilities that scheduled banks must hold as cash with the RBI, earning no interest.
- Regional Rural Banks
- Banks set up under the RRB Act, 1976, owned 50 percent by the central government, 15 percent by the state government, and 35 percent by a sponsor bank.
- Non-performing asset
- A loan or advance where principal or interest is overdue for more than 90 days; it is then classed as substandard, doubtful, or a loss asset.
- RTGS
- Real Time Gross Settlement: an RBI-operated system settling high-value interbank payments individually and instantly, with a minimum transaction of two lakh rupees.
- Memory hierarchy order
- From fastest and smallest to slowest and largest: registers, cache, main memory, solid-state drive, hard disk, and optical or tape storage.
- Private IP ranges
- IPv4 ranges reserved for internal networks: 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255.
- Absolute cell reference
- An Excel reference written with dollar signs before both column and row, such as $A$1, which stays fixed when the formula is copied elsewhere.