RRB JE CBT-2 Electronics · 22 Apr 2025 · Shift 1 — Computer & Financial Awareness

To print all the pages of the document as one set

When printing multiple copies, Collate prints each complete copy as a set in page order (1, 2, 3 then 1, 2, 3) instead of all copies of page 1 first.

Hard Disk

The CPU contains the ALU, the control unit, registers and (on modern chips) cache memory. A hard disk is a secondary storage device outside the CPU.

Setting a password/PIN-protected lock screen

The basic first step in securing a phone or tablet is a lock screen protected by a PIN, password or pattern, so that others cannot access the device. Free public Wi-Fi is actually risky.

Go to Home > Insert > Insert Sheet Columns.

In Excel, a column is inserted from Home > Cells > Insert > Insert Sheet Columns (or by right-clicking a column header and choosing Insert). Ctrl + Z is undo and Ctrl + X is cut.

To block unauthorised access and protect the computer

A firewall monitors incoming and outgoing network traffic and blocks unauthorised access according to set rules, protecting the computer from intruders and malware.

It keeps the session active in RAM while using minimal power.

In Sleep mode the open programs and documents stay in RAM, which is kept powered at a very low level, so work resumes almost instantly. Hibernate saves the session to the disk and powers off.

Toggles between absolute and relative references

While editing a cell reference in an Excel formula, F4 cycles it through absolute and relative forms: A1 → $A$1 → A$1 → $A1. Outside edit mode, F4 repeats the last action.

Setting a password/PIN-protected lock screen

The first basic step to secure a smartphone or tablet is a PIN-, password- or pattern-protected lock screen, which stops others from accessing it; free public Wi-Fi adds risk.

Addresses in the Cc (carbon copy) field are visible to all recipients, so the main recipient can see who else got a copy. Bcc addresses are hidden.

It keeps the session active in RAM while using minimal power.

Sleep mode keeps the open session in RAM, which stays powered at a very low level, so the computer resumes quickly. Hibernate writes the session to disk and powers off.

To print all the pages of a document as a set

Collation prints multiple copies as complete sets in page order (1, 2, 3, then 1, 2, 3), so each copy of the document comes out ready as one set.

To block unauthorised access and protect the computer

A firewall filters incoming and outgoing network traffic according to rules and blocks unauthorised access, protecting the PC from hackers and malicious connections.

Printed Circuit Board

PCB stands for Printed Circuit Board, an insulating board with etched copper tracks that mounts and connects electronic components, such as a computer motherboard.

Toggles between absolute and relative references

While editing a reference in a formula, pressing F4 cycles it through $A$1, A$1, $A1 and A1, i.e. toggles between absolute, mixed and relative references.